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JL Audio M12IB6-CG-TB - Titanium/Black with Classic Grille

600W RMS 12" M-Series Infinite-baffle Marine Subwoofer

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JL Audio M12IB6-CG-TB - Titanium/Black with Classic Grille

600W RMS 12" M-Series Infinite-baffle Marine Subwoofer


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JL Audio M12IB6-CG-TB

JL Marine M12IB6-CG-TB - M Series 12" Marine Subwoofer Driver

Purpose-engineered and built for real marine duty, the M Series infinite-baffle subwoofers are designed to operate without a dedicated enclosure and are targeted towards moderate power applications. The M12IB6-CG-TB is best used with amplifier power in the 200W - 600W RMS range and is optimized to operate with a large volume of air behind it (at least 3 cu. ft.). Like all JL Audio marine speakers, this driver is built to withstand a real saltwater marine environment and deliver years of listening enjoyment.

General Features:



  • 12" M Series Infinite Baffle Marine Subwoofer
  • Power Handling:
    • RMS: 600 watts
  • Impedance: 4 ohm
  • Injection-Molded mica-filled polypropylene cone bodies
  • Synthetic rubber surround specifically formulated with UV inhibitors
  • Marine grade progressive roll synthetic fiber spider
  • Gold-Plated marine-grade brass connection terminals
  • Proprietary Dynamic Motor Analysis (DMA) technology
  • Long linear excursion for enhanced output and reduced distortion
  • Vented motor design with marine-grade, stainless steel rear diffuser plate
  • Specifically engineered Centrex polymer baskets are corrosion & UV-resistant
  • Stainless steel mounting hardware included
  • Efficiency: 86.7 dB
  • Xmax: 18.5 mm
  • Mounting Depth: 8.05"
  • Cutout Diameter: 12.0625"
  • Minimum Sealed Enclosure Volume: 2.0 cu ft / 56.6 L (or larger)
  • Optimum Sealed Enclosure Volume: 3.0 cu ft / 70.8 L
  • Infinite Baffle Use: Yes
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty
JL Audio M12IB6-SG-WH Recommended Power Range

Check out the JL Audio M12IB6-CG-TB Owner's Manual

Subwoofer Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
1200 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
600 watts
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Synthetic Rubber
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Injection Molded Polypropylene (IMPP)
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.0 cubic feet
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
3.0 cubic feet
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
86.7 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
18.5 mm
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.


Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider

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Browse 1 question and 1 answer
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What size speaker wire should I use for this speaker with a 750 watt AMP?
mark m on Apr 4, 2016
Best Answer: Hi Mark,

First, this Subwoofer is only asking for up to 600w RMS, so we suggest making sure your installer understands. As for wiring, 12 gauge will suffice.
Reply (1) · Report · Rick MStaff on Apr 4, 2016
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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: JL Audio M12IB6-CG-TB - Titanium/Black with Classic Grille